What do you mean, good luck?

Good luck, a China idiom, pinyin is dà jí dà lì, which means very auspicious and smooth. Used for divination and blessing in the old days. From The Romance of The Three Kingdoms by Ming Luo Guanzhong. It can also refer to a blessing to others, such as: I wish you good luck, which means wishing others good luck and happiness. It used to be used for divination and blessing.